Gardaí launched an investigation after photographs appearing to show the 17-year-old girl performing a sex act on a man in public at an Eminem concert went viral

Police in Ireland are reportedly awaiting blood test results to establish if the teenager at the centre of the 'Slane Girl' scandal had her drink spiked.

Gardaí launched an investigation after photographs appearing to show the 17-year-old girl performing a sex act on a man in public at an Eminem concert went viral.

Images of the schoolgirl performing the intimate act in broad daylight in front of revellers at Slane Castle on Saturday have been shared by hundreds of social media users.

The Irish Times reported that the girl made a verbal complaint of an unrelated 'serious sexual assault' to gardaí working at the concert, but a police spokesman was unable to confirm the allegation.

There is no suggestion that the complaint has anything to do with the man who she is performing the sex act on.

The teenager is understood to have been examined at a sexual assault unit and blood tests have been carried out, according to the newspaper.

Police are also believed to be investigating a new video which emerged on YouTube yesterday afternoon, showing the schoolgirl surrounded by up to eight men who appear to push her and verbally abuse her as she kisses a young man.

The man is not the same male she was allegedly pictured performing an intimate act on in the photographs posted and shared on social networking sites on Sunday evening.

There is no suggestion that any of the men pictured with the girl or shown in the video are suspected of spiking her drink.

The video was removed by YouTube officials within an hour as it violated the website's community guidelines but gardaí are understood to have accessed the footage and are now investigating.

She and her family have been spoken to by police although she is yet to be formally interviewed.

It was reported that the person originally responsible for posting the graphic pictures online was a man from the Belfast area.

The graphic images appeared online on Sunday and soon went viral on social media.

Twitter, Facebook and Instagram have now taken steps to block the photographs and suspend users sharing the images.

Facebook confirmed it had removed at least one page that published photographs of the schoolgirl because the images violated its terms of service.

A spokesman said Facebook "takes safety incredibly seriously, and have worked hard for years to develop clear rules and powerful reporting tools that enable people to easily report things that make them uncomfortable".

A spokesperson for Twitter said it did not tolerate "child sexual exploitation".

"When we are made aware of links to images of or content promoting child sexual exploitation they will be removed from the site without further notice and reported to The National Centre for Missing & Exploited Children (NCMEC).